Check out the CNN exit poll
http://www.cnn.com/ELECTION/2008/results/polls/#FLI01p1
Supported the Amendment
83% White Republicans
72% Black men
71% Black women
62% Latino Men
66% Latino Women
61% White men
59% White Women
Opposed the Amendment
53% of 18-29
52% of 18-24
62% of Jewish voters
60% of non-protestant religons
65% No religious affiliation